/*
 * Copyright (c) 2020, 2021 Oracle and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.helidon.common.reactive;

import java.util.Objects;
import java.util.concurrent.Flow;
import java.util.concurrent.Flow.Publisher;
import java.util.concurrent.Flow.Subscriber;

/**
 * Implementation of {@link Multi} that is backed by a {@link Publisher}.
 *
 * @param <T> items type
 */
final class MultiFromPublisher<T> implements Multi<T> {

    private final Flow.Publisher<? extends T> source;

    MultiFromPublisher(Publisher<? extends T> source) {
        Objects.requireNonNull(source, "source cannot be null!");
        this.source = source;
    }

    @Override
    public void subscribe(Subscriber<? super T> subscriber) {
        source.subscribe(subscriber);
    }
}
